Malicious PDF / .BIN — malware analysis report

Static analysis result for SHA-256 e255347f8eadd4f1…

MALICIOUS

PDF / .BIN

90.4 KB First seen: 2026-05-10
MD5: 429499136a08b2e55e0f1275239fd222 SHA-1: ef7de4a478001a1f25e3f8d31c2fd7bb5ab8ad2f SHA-256: e255347f8eadd4f126101cf91215d8d63c56f1343a5b2d99771b914118dc5ee7
68 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF exhibits multiple heuristic firings related to embedded content, including JavaScript and an embedded file. The presence of 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_STATIC_TRIAGE' with a 'Long encoded blob' strongly suggests the embedded binary is a malicious payload. The JavaScript action, though not fully detailed, likely facilitates the execution or retrieval of this payload. The embedded file 'embedded_file_obj0003.bin' is the most significant IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7498

Heuristics 7

  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic (matched inside decoded stream)
  • Embedded script payload in PDF stream info PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://cgi.adobe.com/special/acrobat/updateReferenced by PDF JavaScript
    • http://ns.adobe.com/xdp/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xci/1.0/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xci/2.8/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-template/2.1/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-template/2.4/Referenced by PDF JavaScript
    • http://www.w3.org/1999/xhtmlReferenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-data/1.0/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-locale-set/2.1/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-form/2.8/Referenced by PDF JavaScript
    • http://ns.adobe.com/xtd/In PDF document text
    • http://ns.adobe.com/xfdf/In PDF document text

Extracted artifacts 13

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x116BF 86 bytes
SHA-256: f7ee3ef2f8f35d669a6c2b8b0b0ee89655bbc3d04b107a8d22531830f6fc28a1
embedded_file_obj0002.bin pdf-embedded-file PDF EmbeddedFile object 2 at offset 0x11772 1649 bytes
SHA-256: 8474dbb7b936988a66392eb5bc324360acd2f7b9e7daf94e6755770dc8f4d7a7
embedded_file_obj0003.bin pdf-embedded-file PDF EmbeddedFile object 3 at offset 0x11A7B 89275 bytes
SHA-256: 7214e079ba7e989a94f78629be6802734339b943d5a84631e5da8c774f6d20d2
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).
embedded_file_obj0004.bin pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1409E 200 bytes
SHA-256: 500856001a9edb17a299f41c8b34871c12c85d56ec8eff03ef181fca24bb96b5
embedded_file_obj0005.bin pdf-embedded-file PDF EmbeddedFile object 5 at offset 0x14192 2423 bytes
SHA-256: 2d58413fda1ff20c994606823bf49e41194612c0137b6315e50fa7bdc01f1e09
embedded_file_obj0006.bin pdf-embedded-file PDF EmbeddedFile object 6 at offset 0x14473 147 bytes
SHA-256: df22cbfa4044e39e83983eb4f0e1da9cf4c725b030bc5d63bf11af3f740b0a81
embedded_file_obj0007.bin pdf-embedded-file PDF EmbeddedFile object 7 at offset 0x1453C 2064 bytes
SHA-256: a5eb09aa6d8f1367969233946afd459bdaead0db196c56a0f97479e287c8f171
embedded_file_obj0008.bin pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x14859 80 bytes
SHA-256: 2ebdd7efeaa1190ff6bad8cbd649b313e3969564018f204e7385b97c2fab1e19
embedded_file_obj0009.bin pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14902 56 bytes
SHA-256: 4a60a9864cdf7382475d51051a03fdc43b32c31eb508893ccfccece34957f9f1
stream_002_off0000037b.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37B 1532 bytes
SHA-256: f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8
stream_003_off00000567.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x567 870 bytes
SHA-256: 4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb
stream_014_off00002a30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A30 64814 bytes
SHA-256: e1dc8e7db339e2b413611da7a25264ca4e58158182658f06d4034a8cc16195dc
objstm_0276_00.bin pdf-objstm-decoded PDF /ObjStm 276 0 obj (inflated) 3268 bytes
SHA-256: 9c1bc08f81b1eaab82abcd04608c52c179db94939a8783a7558fbf1a8f0fbf7e

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